Tuning First Principles MiMiC Modeling Blocks

The purpose of this technical note is to show the capabilities built into MiMiC Modeling functions for dynamic simulation tuning.

Even the most accurate, dynamic process models can give results that vary from installed plant process equipment. That is because most process simulators do not have a way to easily tune models to compensate for fouling or deterioration of equipment in plants. The screen shot below is for the Heat Exchanger modeling block in MiMiC v3. As you can see the two nubs on the lower left are for the model Fouling_Factor and Heat_Loss_Factor attributes. These attributes can be adjusted between 0 (no heat loss or fouling) to 1 (maximum heat loss or fouling) to make the theoretical heat exchanger model replicate installed systems. Because the modeling blocks are integrated with the complete MiMiC system, these attributes could be tuned or effected with simulation studio, a MiMiC View, in an Operator Training Manager scenario, from a Component Studio Instructor Screen, or through the OPC server (from a DeltaV Operate screen even).

 

In addition, the HX modeling block is a true high-fidelity, first principles modeling block. The thermodynamic calculations used in the block are based upon rigorous differential equations.  This provides accurate process modeling with dynamic updates over a wide application range.